On Thu, 23 Jan 2014, Kevin Oberman wrote:
On Thu, Jan 23, 2014 at 7:47 AM, Thomas Hoffmann <[email protected]> wrote:
On Thu, Jan 23, 2014 at 9:56 AM, Warren Block <[email protected]> wrote:
>
>
> Using -DNOCLEAN with an existing /usr/obj can go even faster than
ccache:
> less than two minutes for a buildworld on my frequently updated i5/SSD
> system, sometimes less than one minute.
Can you elaborate on this, please? I always clear my /usr/obj before
starting a buildworld, which takes 2 hours to run on my system. Are you
saying if I do "make -DNOCLEAN buildworld" I do not have to clear /usr/obj
first
Yes. Removing /usr/obj is a faster way of doing 'make clean', mostly.
AND my buildworld will run faster
Yes, because make will see that many/most files have already been built.
(AND with no downside)?
Well... mostly. :)
I noticed that after 10.0-RELEASE, uname on my system still said
"PRERELEASE". That code had not been rebuilt because make did not see
it as needing a rebuild. You can still delete /usr/obj and run a full
buildworld from scratch every so often.
I should give credit to bdrewery@ for reminding me about -DNOCLEAN when
I was whining about ccache not working on 10.0. It turned out to be a
better solution.
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